///////////////////////////////////////////////////////////////////////////////
//
//                          IMPORTANT NOTICE
//
// The following open source license statement does not apply to any
// entity in the Exception List published by FMSoft.
//
// For more information, please visit:
//
// https://www.fmsoft.cn/exception-list
//
//////////////////////////////////////////////////////////////////////////////
/*
 *   This file is part of MiniGUI, a mature cross-platform windowing 
 *   and Graphics User Interface (GUI) support system for embedded systems
 *   and smart IoT devices.
 * 
 *   Copyright (C) 2002~2018, Beijing FMSoft Technologies Co., Ltd.
 *   Copyright (C) 1998~2002, WEI Yongming
 * 
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 * 
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 * 
 *   You should have received a copy of the GNU General Public License
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 *   Or,
 * 
 *   As this program is a library, any link to this program must follow
 *   GNU General Public License version 3 (GPLv3). If you cannot accept
 *   GPLv3, you need to be licensed from FMSoft.
 * 
 *   If you have got a commercial license of this program, please use it
 *   under the terms and conditions of the commercial license.
 * 
 *   For more information about the commercial license, please refer to
 *   <http://www.minigui.com/blog/minigui-licensing-policy/>.
 */
/*
** Coordinates operations of GDI.
**
** Current maintainer: Wei Yongming.
**
** Create date: 2000/06/12, derived from original gdi.c
*/

#include <stdio.h>
#include <stdlib.h>

#include "common.h"
#include "minigui.h"
#include "gdi.h"
#include "window.h"
#include "cliprect.h"
#include "gal.h"
#include "internals.h"
#include "ctrlclass.h"
#include "dc.h"

/************************ Coordinate system transfer *************************/
void GUIAPI SPtoLP(HDC hdc, POINT* pPt)
{
    /* DK[01/14/10]: Add condition to process case of hdc equal to 
     * HDC_SCREEN_SYS for fix bug 4348. */
    if (HDC_SCREEN == hdc || HDC_SCREEN_SYS == hdc) return;

    coor_SP2LP ((PDC)hdc, &pPt->x, &pPt->y);
}

void GUIAPI LPtoSP(HDC hdc, POINT* pPt)
{
    /* DK[01/14/10]: Add condition to process case of hdc equal to 
     * HDC_SCREEN_SYS for fix bug 4348. */
    if (HDC_SCREEN == hdc || HDC_SCREEN_SYS == hdc) return;

    coor_LP2SP ((PDC)hdc, &pPt->x, &pPt->y);
}

void GUIAPI LPtoDP(HDC hdc, POINT* pPt)
{
    PDC pdc;

    pdc = dc_HDC2PDC(hdc);

    if (pdc->mapmode != MM_TEXT) {
        pPt->x = (pPt->x - pdc->WindowOrig.x)
             * pdc->ViewExtent.x / pdc->WindowExtent.x
             + pdc->ViewOrig.x;

        pPt->y = (pPt->y - pdc->WindowOrig.y)
             * pdc->ViewExtent.y / pdc->WindowExtent.y
             + pdc->ViewOrig.y;
    }
}

void GUIAPI DPtoLP (HDC hdc, POINT* pPt)
{
    PDC pdc;

    pdc = dc_HDC2PDC (hdc);

    if (pdc->mapmode != MM_TEXT) {
        pPt->x = (pPt->x - pdc->ViewOrig.x)
             * pdc->WindowExtent.x / pdc->ViewExtent.x
             + pdc->WindowOrig.x;

        pPt->y = (pPt->y - pdc->ViewOrig.y)
             * pdc->WindowExtent.y / pdc->ViewExtent.y
             + pdc->WindowOrig.y;
    }
}

